I understand English is not your native language, but you may need to clarify what you mean. Also, be careful about non-Latin characters because they may not display correctly on these forums. You said that "– means wait one more beat," but I do not think this is part of standard music notation. Where did you hear or read about this? Do you have a book on piano? If so, which book to you have? Also, if you can afford it, you should invest in a teacher